1. Visible to the naked eye; using the naked eye
   - macroscopic 
2. Large enough to be visible with the naked eye
   - macroscopic

See also: big, large, macroscopically, seeable, visible

• on faith
• on fire
• on guard
• on hand
• on hold
• on ice
• on it
• on occasion
• on one hand
• on one's guard
• on paper
• on purpose
• on request
• on tap
• on tenterhooks
• on that
• on that point
• on the average
• on the ball
• on the button
• on the coattails
• on the contrary
• on the dot
• on the face of it
• on the fence